Evidenzbasierte Medizin vs. Komplementärmedizin
27.08.2015 um 13:32@Kayla
http://chemistry.stackexchange.com/questions/5925/ez-water-fraud-or-breakthroughKayla schrieb:Offizielle und wissenschaftliche Begründung, wieso dieses Experiment nicht seriös ist ?:)
The original "article" linked, contains a number of misleading .
Water molecules make up 99% of your body. This is true, but misleading. According to various sources, the human body is between 57% and 75% water by mass. Since water has a much lower molar mass than most biomolecues, 99% of the molecules in your body may well be water.
The journal listed in which the research is published is Water, which is not a high impact journal, despite its name. Water had an impact factor of 0.973 in 2012. That means that articles published in 2011 in Water were cited less than 1 time each by anyone in 2012. Compare with Cell, which had in impact factor of 31.957 in the same period - each article in Cell is cited an average of nearly 32 times.
Water has a "fourth phase" and no single boiling point or melting point. This is true! Any student of chemistry should be able to tell you this. Take a look at the phase diagram of water below. Water apparently has at least 18 phases (15 solid phases, plus liquid, vapor, and supercritical fluid). You can also see that the solid-liquid and liquid-vapor phase boundaries are not single points. They are curves varying in temperature and pressure. Those curves represent the conditions in which the two phases have the same vapor pressure. This is not a new discovery or a startling secret. This behavior has been known for many decades (if not centuries).
Later on the "article" tells us that EZ-water is not H2O (note that they cannot be bothered to format their chemical formulas) but H3O2, which is alkaline with a negative charge. Hmmm... If it has a different formula and different properties, it must be a different compound. Note that this "formula" is essentially H3O2=H2O+OH, and hints at what happens inside these water ionizers.
EZ-water has a negative charge. It is possible for objects to build up charge, but it is not possible for them to remain permanently charged. Overall, the universe is balanced in charge. Consider lightning as a consequence of attempting to maintain separation of charge. This "negative charge" comes from a misunderstanding of pH. The water definitely has a higher pH, which means more OH− ions than H+ ions, but something (probably Na+) needs to replace the missing H+.
I can go on, but you get the point.
A water ionizer electrolyzes water, which requires electricity (not light as suggested by Mercola). I had the good fortune to be involved in the testing and dismantling of one of these ionizers recently. The device claimed to take ordinary tap water and convert it to a "super-cleaning solution that contained only negatively charged oxygen particles" or something like that. From experiments:
The ionizer increases the pH of the water.
The ionizer does not work with deionized or distilled water!
The ionizer does not produce measurable oxygen gas (a smoldering splint will not relight in the vicinity)
The device contains an electrolysis cell and an ion exchange resin
Here is what happens:
1. Water is electrolyzed.
Doing so requires ions in the water already to conduct the electricity, which is why the device must use tap water (and not purified water). At the cathode, water is reduced to hydrogen and hydroxide. At the anode, it is oxidized to oxygen and protons.
2H2O+2e−⟶H2+2OH−
2H2O⟶O2+4H++4e−
2. Protons are exchanged for sodium ions
To prevent the recombination of hydroxide and protons to form water and neutralize the solution, there is an ion exchange membrane between the anode and the rest of the solution.
H++OH−⟶H2O
The ion exchange resin collects the protons and releases sodium ions into solution to maintain charge neutrality, which must happen or you would have a lightning gun and not a mystic device to produce super water.
Ultimately, drinking this stuff would have no effect on your health.
First, your stomach secretes acid, so any extra base would be neutralized immediately. Let's say an ionizer gets the water's pH to 8 (slightly basic, and more basic than your blood). This means that the concentration of protons is [H+]=10−MpH=10−8 M (remember that pH is a logarithmic scale. The concentration of hydroxide is 10−14/10−8=10−6 M. The pH in your stomach ranges from 1.5 - 3.5, which represent proton concentrations between 10−3.5=3.16×10−4 and 10−1.5=3.16×10−2. If we use the higher pH stomach acid to neutralize an equal volume of EZ-water, the final pH would be:
[H+]f=3.16×10−4−1×10−62=3.15×10−42=1.075×10−4
pH=−log[H+]=−log(1.075×10−4)=3.97
Since your stomach acid would likely have a greater volume than the ionized water, the change in pH would be even smaller. This calculation assumes your stomach acid is not a buffer, which it is.
Second, the acid-base homeostasis of your blood prevents the pH of your body from changing. Yes, your blood pH is 7.4 or so (which is slightly basic), but that does not mean your blood is negatively charged. Outside of range of 7.38 - 7.42 all of your blood proteins (like hemoglobin) start to denature, which will kill you.
